Quarter Persons, Seasonally Adjusted 2006-01-01 16024311.231816800 2006-04-01 16222071.460138101 2006-07-01 16377893.924575899 2006-10-01 16558723.383469202 2007-01-01 16636964.442201398 2007-04-01 16655395.857575400 2007-07-01 16710415.930837499 2007-10-01 16719823.769385701 2008-01-01 16953416.676351500 2008-04-01 17158332.485236500 2008-07-01 17309777.597989902 2008-10-01 17487173.240422197 2009-01-01 17507439.068253300 2009-04-01 17798752.822396600 2009-07-01 18062814.245644400 2009-10-01 18223093.863705800 2010-01-01 18522847.635615500 2010-04-01 18674964.607072100 2010-07-01 18729637.912001200 2010-10-01 18906549.845311098 2011-01-01 19298378.490447700 2011-04-01 19441647.774048697 2011-07-01 19612377.407505598 2011-10-01 19614196.327998000 2012-01-01 19752111.892754700 2012-04-01 19948402.052567800 2012-07-01 20145341.247711200 2012-10-01 20516444.806966300 2013-01-01 20624530.476675800 2013-04-01 20781105.010454800 2013-07-01 20778615.037360700 2013-10-01 20916049.475508800 2014-01-01 20981327.285843600 2014-04-01 21051640.929916200 2014-07-01 21254067.037532100 2014-10-01 21392764.746708100 2015-01-01 21521908.520659100 2015-04-01 21624229.783687100 2015-07-01 21767859.864061600 2015-10-01 21935501.831592300 2016-01-01 22009517.467768900 2016-04-01 22153558.572072700 2016-07-01 22408564.010154000 2016-10-01 22567959.950004500 2017-01-01 22788658.431085500 2017-04-01 22938381.776016798 2017-07-01 23122695.097302400 2017-10-01 23233164.695595300 2018-01-01 23233118.977142800 2018-04-01 23283903.709690798